Strangely, she lifted us up like a feather on a breeze.
this sentence uses which two types of figurative language?
a)simile and onomatopoeia
b)metaphor and onomatopoeia
c)personification and simile
d)personification and metaphor

Yes, it could be either A or C, because there is definitely a simile in the sentence: like a feather on a breeze.
I'd choose C. personification and simile, because there is no onomatopoeia here (imitation of sounds from nature). I don't see any personification either, unless the word she refers to somebody who is not human. 

Write down what you think is a rule that could explain what makes a sentence grammatically correct or not. For example, you might write something like: "verbs always match nouns in number, and they usually come before the noun." In other words, make your best guess for the grammar rule that makes sense out of the pattern(s) you see in the phrases you have been working with. Review if you need to, and you might briefly check your hunches against the sentences you have been working with in this or previous modules. Keep in mind that what you're after is your hunch, not a grammar rule from a text book. Now check your hunch with the explanation of this principle in the following pattern.

Explanation: